72207461 has 4 divisors (see below), whose sum is σ = 74159052. Its totient is φ = 70255872.

The previous prime is 72207433. The next prime is 72207481. The reversal of 72207461 is 16470227.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63504961 + 8702500 = 7969^2 + 2950^2 .

It is a cyclic number.

It is not a de Polignac number, because 72207461 - 2¹⁰ = 72206437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72207481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 975740 + ... + 975813.

It is an arithmetic number, because the mean of its divisors is an integer number (18539763).

Almost surely, 2^72207461 is an apocalyptic number.

It is an amenable number.

72207461 is a deficient number, since it is larger than the sum of its proper divisors (1951591).

72207461 is a wasteful number, since it uses less digits than its factorization.

72207461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951590.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 72207461 is about 8497.4973374518. The cubic root of 72207461 is about 416.4159520693.

Adding to 72207461 its reverse (16470227), we get a palindrome (88677688).

The spelling of 72207461 in words is "seventy-two million, two hundred seven thousand, four hundred sixty-one".